Two in the afternoon, seventy percent at the temples
She sits down, pulls her hair back and shows me the temples first. Everyone does. She has put root spray on them that morning and it comes off on my comb as brown dust, so it has to come out at the basin and dry again before I can count, fifteen minutes I had not booked, and she apologizes for it twice, which half my Tuesday clients would not. Seventy percent white at the temples, easy. The back is a different head, twenty percent, scattered, mostly her natural level 5. She wants a warm dark blonde, a 6 with gold in it. And she wants it to stay covered this time, which usually means one bowl went on the whole head.
So, the numbers. Seventy at the temples puts the natural share at three quarters. Twenty through the back puts it at one quarter. A 6 is one level above her base, so 20 volume handles it. Two bowls on one head: 45 g of 6N with 15 g of 6.3 for the hairline and temples, 15 g of 6N with 45 g of 6.3 through the back. I once swapped those bowls, 1/4 N on seventy percent temples, see-through by the second shampoo, and the free redo nine days later cost 60 g of color and an hour, so the temple formula goes in the black bowl now.
For her the calculator runs twice.
Percent gray decides the natural share, nothing else does
Texture moves the timing and the target level moves the developer. The natural share comes from one number: the white in the section I am about to paint, counted by eye on a clean dry parting.
| Gray in the section | Natural series share | In a 60 g formula |
|---|---|---|
| 0 to 25 percent | 1/4 N | 15 g N + 45 g target shade |
| 30 to 50 percent | 1/2 N | 30 g N + 30 g target shade |
| 55 to 75 percent | 3/4 N | 45 g N + 15 g target shade |
| 80 to 100 percent | 100 percent N, or NN if resistant | 60 g N, gloss for tone after |
Estimate by section, because temples and nape are rarely the same number. (Overhead salon light makes every parting look grayer than it is, so I count at the window.) Right on one of the table's steps, I go by feel and by what the hair did last time. And mix the N at the level you are going to, so a 5 going to a 6 gets 6N.
Twenty volume does the covering
20 volume opens the cuticle enough for permanent dye to get in and lifts a level if needed, which is nearly every gray client. 30 volume only when the target sits two full levels above the base, and the trade is sheerer white, because the peroxide spends itself lifting. I have never liked it on a gray head; plenty of colorists use it routinely. Three levels or more is a different service: permanent color cannot lift that far and lay down opaque pigment, so lighten first and cover on 20 volume next visit, or steer her to a target within two levels on the level chart.
Going darker is easy on the chemistry and hard on the eye. Drop three or more levels onto a lot of white and it can go flat, even faintly green, with no warm underlying pigment to hold the depth, so add gold or copper, or pre-fill.
Why white hair fights you
There is no pigment in the strand, so whatever you deposit is all anyone sees, and a sheer shade that looks rich over a level 6 base is tinted glass over white. The cuticle on gray, especially at the front hairline, often lies tighter, and coarse resistant white can be almost glassy, so dye struggles to get in. And white reflects light, so every under-saturated strand shows. Natural series shades carry all three primaries in balance and do the opaque work. Soft, average or resistant the calculator takes on my word, which comes from finger and thumb and is sometimes wrong on a first visit.
Putting it on the head
- Start at the grayest area. Temples and front hairline usually, sometimes the crown: the most resistant hair needs the longest contact.
- Take quarter-inch subsections at the regrowth and load the brush. Gray wants product on every strand, all the way round, none of it smeared across the top.
- Resistant white on a heavy-gray head: pre-soften. Apply the mixed formula, or plain 20 volume, to the white patches for five to ten minutes, then apply fully. Or use the NN shade and skip the step.
- Process the full time. 35 minutes is the floor once there is real gray in the mix, 45 for 50 percent and up or anything wiry, and coarse hair earns another five. The processing time calculator adjusts for heat and hair.
- Check before you rinse. Wipe a strand at the temple. Still translucent? Five more minutes, then wipe it again.
Tones that lie on white hair
Reds, coppers and violets are gorgeous on pigmented hair and see-through on white. Past 50 percent gray they need a natural at the same level in the bowl, often half a level darker than the target, so the depth reads before the tone does. Ash lies the other way, dull or drifting green on heavy gray because there is no warmth for the blue-green pigment to cancel, so balance it with N and keep the cool to a whisper.
What to tell the client
What I tell her: your white hair needs more of the base shade than the rest, so the temples read a touch softer than the back. We are on 20 volume, which is there to cover, and it needs the full 45 minutes. Book before the regrowth passes half an inch, because fresh white next to covered white is where it looks patchy. More than two levels lighter is two visits. And to skip the spray next time, or at least tell me it is on there.